Lings lippincott and alfred j



2 L mmmlmn H. P. L. LAUSSUCQ. FILLING SYSTEM FOR PRESSES.

APPLICATION HLED 1AN.27. 1919.

Patented Nov. 2, 1920.

3 SHEETSSHEET I.

25 I m 1 J O 1M. x m

22 mmmlmn mm mmmm IN VE/VTOR Henri Fibrrc Laurent Laussuc ATTORNEY...

H. P. L. LAUSSUCQ.

FILLING SYSTEM FOR PRESSES.

APPLICATION FILED JAN.27. I919.

Patented Nov. 2, 1920.

3 SHEETS-SHEET 2.

Hem L Pierre [aux 3rd; [dUSSL/CZ H. F. L. LAUSSUCQ. FILLING SYSTEM FOR PRESSES.

APPLICATION FILED ]AN.27, 1919. 1 ,357,330, Patented Nov. 2, 1920.

m w w a M U Mk V e A N w m .m V w MM 5 Q R M. Kw R \n mm M. &% NH- HENRI PIERRE LAURENT LAUSSUGQ, 0F CAMDEN, NEW

T OFFICE.

JERSEY, ASSIGNOR TO HEU- LINGS LIPPINCOTT AND ALFRED J. MAJOR, AS RECEIVERS OF CAMDEN IRON WORKS, OF CAMDEN, NEW JERSEY, A CORPORATION OF NEW JERSEY.

FILLING SYSTEM FOR PRESSES.

Application filed January 27, 1919. Serial No. 273,219.

To all whom it may concem:

Be it known that I, HENRI PIERRE LAU- RENT LAUssUcQ, a citizen of the United States, residing at 1426 Baird avenue, Cam den, in the county of Camden and State of New Jersey, have invented a certain new and useful Filling System for Presses, of

which the following is a specification.

My invention relates to hydraulic pressure machines in which two operating systems, including separate pressure cylinders contain or are supphed wlth equal or proportional quantities of water under pressure which is forced into the cylindersusually by an intensifier, and in which leakage may vary the quantity of water in either or both systems from that intended or in which the proportionate quantities of water-in the operating systems may require changing from time to time.

The purpose of my invention is to provide for increase of the total quantity of water in one of two such operating systems, in-

, eluding its cylinder and connections, as compared with the other in order to replace leakage orto vary the proportionate contents and hence vary the relative positions of the pistons in the cylinders.

A further purpose is to maintain a predetermined proportion in the water contents of hydraulic cylinders and their operating connections having common control or to vary' the proportions of liquid in the respective cylinders andconnections so controlled.

A further purpose is to provide an equalizing valve for selectively varying the total water contents of different cylinders and their operating connections having common control, and to fully protect the valve when not so used from the strain of liquid under pressure. 7

Further purposes will appear in the specifications and in the claims.

I have preferred to illustrate my invention by but one form, selecting a form which in use has shown excellent results in the control of liquid supply to the cylinders of hydraulic shears; which is simple, highly practicable and very efiici'ent and which at the same time well illustrates the principles of my invention.

" Figure 1 is a perspective view showing my invention applied to a hydraulic plate shear.

Specification of Letters Patent.

Fig. 2 is a side elevation, partly sectioned and partly illustrating the same application of my invention.

Fig.3 is a longitudinal section showing one form of valve by which the filling operation may be performed.

In the drawing similar numerals indicate like parts.

In the hydraulic operation of a die, such as a shear blade having any considerable length and requiring the use of separate cylinders at opposite ends, it is highly desirable that the total liquid contents of each pressure system, i. 6., the volumes of water contained in the several cylinders, here uniformly considered as two, and in their respective operating connections) shall be under complete control. This desirability will be seen by consideration of thecase of the shear illustrated, in which it is evident that it is necessary to maintain any desired angle of the upper shear blade with respect to the lower blade, for work of a given character even if it be not desired to alter this angle for different characters of work.

The ordinary drain cocks with which the cylinders are equipped provide for letting water out of these systems but do not provide for supplying water to them.

Any leakage, from the cylinders control ling the movement of the upper blade, or from the operating connections therefor, will cause an alteration or change of the rake of the die or shear blade and must be replaced. Again, if it be desired to make any change in the rake of the die or shear blade for the more effective cutting of a different thickness or character of metal sheet, it is necessary to furnish additional motive fluid to one of the pressure systems, either within its cylinder or its connections, as compared with the fluid supply within the cylinder and connections forming the other pressure system. I

The construction of the shear and of its intensifier fluid supply are both well known and I have therefore not considered it necessary to give more than a general illustration of their structure. My invention does not reside in the shear or other mechanism operated, whether supplied with operating fluid from an intensifier or not, but in the application of a filling system to the fluid operating systems of any such mechanism.

- The frame 5' of the shear is mounted upon constant fluid pressure from an accumulator provided for this purpose, conveyed through pipes 14:, 15 and 15'to the pull back cylindersand acting through their pistons 16, beam 17 and links 18.

The beam 9 is moved downwardly by pressure cylinder pistons 19, 19 resting in concave seats 20 (Fig. 2) within the upper surfaces of shoes 21. These shoes aremovable longitudinally of the beam -9 to accommodate variations in effective length when the rake of the blade 10 is changed.

I Where the pull back cylinders are constantly under fluid pressure, as in the illus- "trationand asdistinguished from intermittent pull back operation between actuations of the main pistons, thepressure in themain cylinders,or their diameters or, preferably both, must exceed those of the pull back cylinders to an extent determined by the shearing pressure required less the weight of the moving parts. This is usually taken care of by using pistons for the main cylinders which are larger than the pull back pistons, by usinga higher accumulator pressure for the performance of the work than for the pull back return and by further increasing the difference between the available pressures through the use of an intensifier of which one form is shown at 22. The accumulator pressure is applied through pipe to the low pressure cylinder 24, and from four high pressure or intensifier cylinders to the operating cylinders ofthe shear.

' The high pressure or intensifier cylinders are conneited inpairs to the respective main cylinders 12 and 12 of the shear by pipes 26, 26, the pairs being made up of diagonally opposite cylinders in each case.

' This arrangement is well known and results in'the supply of equal quantities of "l qu dtothetwo cylinders 12 and 12 in the "same" t'lme'where the high pressure cylinders of one intensifier pair are the same size as those of the other pa r and could be made to supply any proportionate ratios of liquid to the ,two cylinders 12 and 12 which the pull-back cylinders in such a construction,

W l ine I ha e n t r gar d it as necessary to disclose it, except in the most general way and consider description of the valves and connection for this purpose unnecessary.

lVith the arrangement shown, with the two diagonally opposite high pressure cylinders of the intensifier feeding one of these main cylinders 12 or 12 and the two'intermediate high pressure intensifier cylinders feeding the other thereof, not only are the two pairs of intensifier cylinders intended to deliver motive fluidwater-.at the same rate or in a predetermined ratio to the respective pressure cylinders but each of the two fluid pressure operating systems, the shear pressure cylinders and their respective feeding (by which I designate intensifier cylinders and piping) connections must also be full of water to makethe pressure effective. Should any of the water leak from either of these fluid pressure operating systems, orshould it be desired to advance the one, end of the upper, or movable die or blade with respect to the other to change the cutting angle or rak of the movable blade, it will evidently be necessary to introduce additional water within the operating system controlling that end of the blade.

My invention relates to .the means and method of maintaining or increasing the fluid contents of pressure systems, operating cylinders concurrently, whereby the waste may be replaced or the relative fluid contents may be varied. T accomplish this by tapping the two systems at any convenient points, here within the connecting pipes 26,

26, to feed fluid into one or other of the circuits through filling pipes 27, 2?, and a controlling valve 28.

Asthe filling of either pressure system will take place against the pull-back pressure only and the pressure .pistonsare larger in diameter than the pull-back pistons, the filling fluid can be fed from the accumulator supplying the pull-back cylindersor from that supplying the low pressure intensifier cylinder, or from another source, as preferred. This permits the use of a much lighter valve 28 than would be required if it were necessary to handle the intensified pres ure and avoids the necessity of supng -from some other source pressure equal to thatsupplied by the intensifier.

Tn order to permit use of the lighter valve, it is necessary to protect the valve from the intensified pressure when the intensifier is being used. to operate the shear. The valve is protected from reverse flow or" water un der intensified pressure by inserting a check valve 29 at a convenient point in each of the feeding pipes 26 or 26' between the controlling valve and the point of connection with the system being filled. These check valves are shown within casings 30 in the illustration. i i

' The body 31 of the controlling. va ve is provided with an inlet 32, from any suitable fluid pressure source, an exhaust 33 usually to a sewer connection, and two feed ing (pressure) outlets, 34, 34' supplying plpes 26, 26'. The piston rod or plunger 35 is moved by a lever 36 pivoted to the piston 1 at 37 and connecting with the body by a at a number of points, as at 41; The bushing is retained, longitudinally by a calked flange 42 at one end and a fixed flange 42' at -the other entering corresponding enlargeby inner (here interiorly flanged) ends 46 of V a tubular (glanded) closure 47 and at the 'ments of the valve bore. At each end of the bushing annular recesses 43, 43' connect at all times with outlets 34, 34.

At their outer ends recesses 43, 43 are closed by packing 44, 44' which is held in place on one side of each by flanged rings On the other side, at one end it is held other end by a cap 48. The rings 45 seat against body flanges 49 on the inner sides and on'the outer sides their flanges 5O chan- Del the facing sides of the ring packing, both retaining and spreading it.

Exceptv for the gland and packing at 51 for the piston rod, the glanded closure 47' and cap 48 are duplicates, being threaded into the body at 52, 52,'packed at 53, 53 and provided with tubular extensions 54, 54

-whose interiors 55 55' are constantl in communi'cation with the exhaust 33 through apertures 56, 56', annular spaces 57, 57 and exhaust channels 58, 58.

The valve spindle or plunger 35 carries its operating parts between a flange 59 near one end and a suitable locked nut 60 at the other. These parts comprise oppositely facing coun- .terpart members.

At the center, by means of two facing cupped packing rings 61, 61 spaced by collar 62, I provide an extended sealing surface,

tubes 64, 64'. Upon these tubes are mounted sealing the inlet from the rest of the valve at the middle plunger position.

The rings are held in place at their outer sides by facing annular flanges 63, 63 upon sleeves 65, 65' of larger internal diameters than the external diameters of the tubes, providing" annular spaces 66, 66 between,

which are open at their inner ends at 67, 67

The sleeves are each apertured at two axially separated points 68, 69 and 68, 69

so chosen that for each sleeve they lie on op-- posite sides of the packing 44, 44' in the middle position of the plunger, but on the same side of this packing in the extreme plunger positions; being then, both between the packing and the inlet 32 at one end, and both beyond the packing from the inlet 32 at the other end of the valve.

In operation :-In the neutral (middle) position of the valve plunger shown in Fi 3, and to which the position of the parts in the other figures corresponds, the accumulator pressure through valve inlet 32- is held by packings 61, 61' from communication with the rest of the valve. Even if they leak, no harm will be done as the leakage flow would enter the open ends 67, 67 of spaces 66, 66 and pass to the exhaust through apertures 68,68, spaces 55, 55, and apertures 56, 56.

Since both of the outlet connections 34, 34 are in communication with the exhaust through apertures 69, 69, spaces 66, 66 and the path above described, leakage of intensifier pressure past the check valves will pass to the exhaust, relieving the valve wholly from intensifier pressure.

When the plunger is moved to either ex- -tremity of its stroke the action is the'same,

the only difference being as to which of the outlets 34 or 34' is connected with the inlet 32 to fill, the other remaining in communication with the exhaust. I will therefore describe but one of them.

If the plunger be moved to the right (in Fig. 3') the packing 61 passes the apertures 41 and the inlet communicates freely with outlet34 apertures 41, space 66 and apertures 68 or 69. Since'the apertures 68 pass the packing 44, this packing shuts off the path to the exhaust.

, Though movement of the plunger to the right cuts off the [connection of outlet 34 withspace 66 through apertures 69 it does not out 01f communication through this space to the exhaust, as the water from outlet 34 is free to enter the open end 67 of this space.

In either event the valve piston is moved so as to admit accumulator pressure through the appropriate end of the valve and the corresponding check valve to that pressure system from which-the leakage has taken place, or within which the motive fluid is otherwise additionally required.

It will thus be seen that between the drainage taps and the filling system herein provided, the total quantity of motive fluid in each of the pressure systems may be adjusted, as well as the proportion which these bear to each other, providing a flexibility and control not otherwise attainable.

' When filling is not needed, the shear or other device may be operated as usual without in any way affecting the filling connec- "tion. When it is desired to fill either pressure system the controlling valve plunger 35 'ismoved in the appropriate direction and is completed; s 1 1 Having thus described my invention, what I claim as new and desire to secure by Let ters Patent is: A

1. In a-device of the character stated, an intensifier, having two 1 separate outlets therefrom, proportionately supplied from said intensifier, a pair of cylinders fed from said outlets, mechanism operated by the pistons of the cylinders, pistons therein, connections between the intensifier and the two cylinders forming two pressure systems one for each cylinder and selective means for supplying fluid to either system.

2. In a device of the character stated, a pair of hydraulic cylinders, pistons therein, mechanism operated by the pistons, separate pressure connections for said cylinders at a constant proportion one to the other, a source of pressure supply and connections for selectively applying said source of supply to either of said cylinders and connec tions to fill the one without filling the other.

3. In a device of the character stated, an intensifier having separate fluid paths and outlets, two pressure cylinders and connections from one to'each of said outlets forming with the intensifier separate pressure systems fed proportionately from said accumulat'or, in combination with'a source of pressure supply, connections therefrom to the two pressure systems, and a check valve in each connection.

4. In a device of the character stated, an intensifier having separate fluid paths and outlets, two pressurecylinders and connections from one to each of said outlets forming with. the intensifier separate pressure systems red proportionately, from said intensifier, in combination with a source of aressure supply, connections therefrom to the two pressure systems and a check valve in each connection said connections being normally at exhaust between the check valve and the pressure supply.

5. In a device of the character stated, a pair of pressure systems lncludlng cyl nders and pistons therein, and a-filling system for said pressure systems, comprisinga valve having inlet, exhaust and two outlets normally connected with'the exhaust, but selectively connected with the inlet in other positions of the valve, connections from the two outlets to the two pressure systems and a I check valve in each connection preventing the fluid from the pressure systems from returning to the valve.

6. In a device of the character stated, a pair of cylinders, pistons therein and mecha- 'nism operated by the pistons, a.constantly operating return for the mechanism and pistons, d stinct fluid pressure supplies for sald ylinder ermellreeehe e ia fl i we tent, comprising with the cylinder contents pressure-systems, connection with veach system, a check valve in each connection and fluid pressure filling means normally at exhaust for selectively filling either system through its check valve.

u 7. In a device'of the character stated, an

intensifier having separate high pressure cylinders, a pair of operating cylinders, each connected. with different intensifier cylin ders, -.iorming separate pressure systems, a piston in each operating cylinder, mechanism operatedby the pistons, pull-back connections for the mechanism and means for varying the fluid content of the two pressure systems comprising connections with the two systems, a check valve in each connection, a fluid pressure supply and means for directing the fluid pressure supply selectively through either check valve at will, the supply being normally cut off from the said means and saidmeans being at exhaust.

8. A fillingsystem for presses comprising a valve having an inlet, an exhaust and two outlets, the latter spaced on opposite sides axially of the inlet and normally connected with the exhaust, a valve piston movable in opposite directions to connect the inlet and either outlet at will, connections from the outlets of the valve and a check valve in each of said connections preventing fluid movement toward the valve.

9. A filling system for presses, comprising a valve having an inlet, an exhaust and two outlets, the latter spaced on opposite sides axially of the inlet and normally connected with the exhaust, a valve piston movable in opposite directions to connect the inlet and either outlet at will while maintaining the other outlet at exhaust, connections from the.

outlets of the valve and a check valve in each of said connections preventing fluid movement toward the valve. r

10. A filling system for selectively filling either oi two hydraulic pressure systems, which consists in a valve having a central inlet, end exhausts and intermediate outlet connections, a valve piston normally cutting ofl the inlet from both outlets and connecting. the outlets with the exhaust and, in positions on opposite sides ofits normal position, connecting one or other of the outlets with the inlet, means for operating said piston, and connections from said outlets, there being a check valve in each outlet connection.

11, A filling system for selectively filling 7 the inlet, the other outlet being maintained in connection with the exhaust, means for operating said piston, and connections from said outlets, there beinga check valve in each outlet connection.

12. In a filling system for hydraulic machinery, a closed hydraulic pressure system to be filled, a connection therewith, a check valve in the connection preventing fluid movement away from the system, a filling pressure supply and a valve between the filling pressure supply and the check valve normally maintaimng the main interior part of the valve at exhaust.

13. A filling system for hydraulic machinery having filling pressure supply, valve distribution therefor and check valve protection for the connections between the distributing valve and the systems to be filled and having these connections normally connected to the valve exhaust.

14. A filling system for hydraulic machinery comprising a pair of closed fluid pressure systems to be filled, a filling pressure supply, a distributing valve for said supply, check valves between the distributing valve and the systems to be filled and means Within the distributing valve for protecting it against pressure from the systems being filled in caseof leakage of the check valve.

HENRI PIERRE LAURENT LAUSSUCQ. 

